title: Feature selection environment for genomic applications.
abstract: BACKGROUND
  Feature selection is a pattern recognition approach to choose important variables according to some criteria in order to distinguish or explain certain phenomena (i.e., for dimensionality reduction). There are many genomic and proteomic applications that rely on feature selection to answer questions such as selecting signature genes which are informative about some biological state, e.g., normal tissues and several types of cancer; or inferring a prediction network among elements such as genes, proteins and external stimuli. In these applications, a recurrent problem is the lack of samples to perform an adequate estimate of the joint probabilities between element states. A myriad of feature selection algorithms and criterion functions have been proposed, although it is difficult to point the best solution for each application.
  
  
  RESULTS
  The intent of this work is to provide an open-source multiplatform graphical environment for bioinformatics problems, which supports many feature selection algorithms, criterion functions and graphic visualization tools such as scatterplots, parallel coordinates and graphs. A feature selection approach for growing genetic networks from seed genes (targets or predictors) is also implemented in the system.
  
  
  CONCLUSIONS
  The proposed feature selection environment allows data analysis using several algorithms, criterion functions and graphic visualization tools. Our experiments have shown the software effectiveness in two distinct types of biological problems. Besides, the environment can be used in different pattern recognition applications, although the main concern regards bioinformatics tasks.
authors.affiliation: Instituto de Matemática e Estatística, Universidade de São Paulo, São Paulo, SP, Brazil. fabricio@utfpr.edu.br
authors.forename: Fabrício Martins
authors.initials: FM
authors.lastname: Lopes
authors.forename: David Corrêa
authors.initials: DC
authors.lastname: Martins
authors.forename: Roberto M
authors.initials: RM
authors.lastname: Cesar
mesh_terms: D000465:Algorithms; D001499:Bayes Theorem; D019295:Computational Biology / Q000379:methods*; D003627:Data Interpretation, Statistical; D023281:Genomics / Q000379:methods*; D020407:Internet; D008390:Markov Chains; D008957:Models, Genetic; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012984:Software; D014584:User-Computer Interface